package com.zhulong.saas.cloud.gateway.config;

import com.zhulong.saas.cloud.gateway.propbean.SwaggerResourceItemProp;
import com.zhulong.saas.cloud.gateway.propbean.SwaggerResourcePropertyBean;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.config.GatewayProperties;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.support.NameUtils;
import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;
import springfox.documentation.swagger.web.SwaggerResource;
import springfox.documentation.swagger.web.SwaggerResourcesProvider;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

@Slf4j
@Component
@Primary
@AllArgsConstructor
public class SwaggerResourceConfig implements SwaggerResourcesProvider {

    private final RouteLocator routeLocator;
    private final GatewayProperties gatewayProperties;
    public static final String API_URI = "/v3/api-docs";


    private SwaggerResourcePropertyBean swaggerResourcePropertyBean;


    @Override
    public List<SwaggerResource> get() {

        List<SwaggerResource> resources = new ArrayList<>();
        List<String> routes = new ArrayList<>();
        //取出gateway的route
        routeLocator.getRoutes().subscribe(route -> routes.add(route.getId()));
        //结合配置的route-路径(Path)，和route过滤，只获取有效的route节点
        gatewayProperties.getRoutes().stream().filter(routeDefinition -> routes.contains(routeDefinition.getId()))
                .forEach(routeDefinition -> routeDefinition.getPredicates().stream()
                        .filter(predicateDefinition -> ("Path").equalsIgnoreCase(predicateDefinition.getName()))
                        .forEach(
                                predicateDefinition -> {
                                    System.out.println(predicateDefinition.getArgs());
                                    Optional<SwaggerResourceItemProp> resourceItem = swaggerResourcePropertyBean.getItems().stream().filter(item -> item.getId().equals(routeDefinition.getId()))
                                            .findFirst();
                                    resourceItem.ifPresent(swaggerResourceItemProp -> swaggerResourceItemProp.getGroupNames().forEach(groupName -> {
                                        resources.add(swaggerResource(swaggerResourceItemProp.getSystemName() + "-" + groupName, "/" + routeDefinition.getId() + API_URI, groupName));
                                    }));
//                                    resources.add(swaggerResource(routeDefinition.getId(),
//                                            "/" + routeDefinition.getId() + API_URI));
                                }
                        ));
        return resources;
    }

    private SwaggerResource swaggerResource(String name, String location) {
        log.info("name:{},location:{}",name,location);
        SwaggerResource swaggerResource = new SwaggerResource();
        swaggerResource.setName(name);
        swaggerResource.setLocation(location);
        swaggerResource.setSwaggerVersion("1.0");
        return swaggerResource;
    }

    private SwaggerResource swaggerResource(String name, String location, String groupName) {
        SwaggerResource swaggerResource = new SwaggerResource();
        swaggerResource.setName(name);
        if (location.indexOf("?") > 0) {
            location += "&group=" + groupName;
        } else {
            location += "?group=" + groupName;
        }
        swaggerResource.setLocation(location);
        swaggerResource.setSwaggerVersion("3.0.3");
        return swaggerResource;
    }
}